./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b164c8a6d888b02829fcf47aa29b65b3f70721fb3d5c6d11e211a49d8b59e83 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:49:52,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:49:52,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:49:52,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:49:52,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:49:52,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:49:52,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:49:52,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:49:52,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:49:52,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:49:52,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:49:52,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:49:52,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:49:52,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:49:52,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:49:52,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:49:52,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:49:52,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:49:52,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:49:52,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:49:52,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:49:52,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:49:52,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:49:52,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:49:52,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:49:52,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:49:52,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:49:52,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:49:52,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:49:52,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:49:52,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:49:52,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:49:52,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:49:52,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:49:52,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:49:52,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:49:52,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:49:52,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:49:52,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:49:52,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:49:52,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:49:52,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:49:52,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:49:52,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:49:52,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:49:52,255 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:49:52,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:49:52,255 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:49:52,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:49:52,256 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:49:52,256 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:49:52,256 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:49:52,257 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:49:52,258 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:49:52,258 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:49:52,258 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:49:52,259 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:49:52,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:49:52,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:49:52,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:49:52,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:49:52,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:49:52,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:49:52,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:49:52,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:49:52,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:49:52,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:49:52,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:49:52,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:49:52,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:49:52,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:49:52,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:49:52,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:49:52,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:49:52,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:49:52,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:49:52,266 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:49:52,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:49:52,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:49:52,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:49:52,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:49:52,268 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b164c8a6d888b02829fcf47aa29b65b3f70721fb3d5c6d11e211a49d8b59e83 [2021-10-29 04:49:52,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:49:52,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:49:52,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:49:52,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:49:52,617 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:49:52,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-29 04:49:52,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/data/d7020222c/7bbf016be9f249a2bf35effec082cb92/FLAG2cb83f1c8 [2021-10-29 04:49:53,402 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:49:53,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-29 04:49:53,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/data/d7020222c/7bbf016be9f249a2bf35effec082cb92/FLAG2cb83f1c8 [2021-10-29 04:49:53,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/data/d7020222c/7bbf016be9f249a2bf35effec082cb92 [2021-10-29 04:49:53,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:49:53,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:49:53,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:49:53,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:49:53,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:49:53,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:49:53" (1/1) ... [2021-10-29 04:49:53,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc55f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:53, skipping insertion in model container [2021-10-29 04:49:53,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:49:53" (1/1) ... [2021-10-29 04:49:53,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:49:53,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:49:54,287 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-29 04:49:54,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:49:54,341 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:49:54,490 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-29 04:49:54,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:49:54,537 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:49:54,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54 WrapperNode [2021-10-29 04:49:54,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:49:54,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:49:54,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:49:54,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:49:54,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:49:54,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:49:54,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:49:54,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:49:54,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:49:54,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:49:54,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:49:54,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:49:54,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (1/1) ... [2021-10-29 04:49:54,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:49:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:49:54,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:49:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:49:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:49:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:49:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:49:54,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:49:57,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:49:57,188 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-29 04:49:57,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:49:57 BoogieIcfgContainer [2021-10-29 04:49:57,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:49:57,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:49:57,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:49:57,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:49:57,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:49:53" (1/3) ... [2021-10-29 04:49:57,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211fdca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:49:57, skipping insertion in model container [2021-10-29 04:49:57,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:49:54" (2/3) ... [2021-10-29 04:49:57,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211fdca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:49:57, skipping insertion in model container [2021-10-29 04:49:57,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:49:57" (3/3) ... [2021-10-29 04:49:57,205 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2021-10-29 04:49:57,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:49:57,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:49:57,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:49:57,290 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:49:57,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:49:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-29 04:49:57,322 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:49:57,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:49:57,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:49:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:49:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash 379025287, now seen corresponding path program 1 times [2021-10-29 04:49:57,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:49:57,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513485004] [2021-10-29 04:49:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:49:57,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:49:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:49:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:49:57,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:49:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513485004] [2021-10-29 04:49:57,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513485004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:49:57,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:49:57,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:49:57,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680235822] [2021-10-29 04:49:57,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:49:57,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:49:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:49:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:57,850 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:49:58,400 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-29 04:49:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:49:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-29 04:49:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:49:58,423 INFO L225 Difference]: With dead ends: 224 [2021-10-29 04:49:58,424 INFO L226 Difference]: Without dead ends: 145 [2021-10-29 04:49:58,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-29 04:49:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-29 04:49:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-29 04:49:58,485 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-29 04:49:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:49:58,486 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-29 04:49:58,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-29 04:49:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-29 04:49:58,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:49:58,491 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:49:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:49:58,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:49:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:49:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -615336422, now seen corresponding path program 1 times [2021-10-29 04:49:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:49:58,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27200240] [2021-10-29 04:49:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:49:58,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:49:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:49:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:49:58,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:49:58,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27200240] [2021-10-29 04:49:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27200240] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:49:58,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:49:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:49:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888848322] [2021-10-29 04:49:58,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:49:58,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:49:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:49:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:58,605 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:49:59,069 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-29 04:49:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:49:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-29 04:49:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:49:59,073 INFO L225 Difference]: With dead ends: 431 [2021-10-29 04:49:59,074 INFO L226 Difference]: Without dead ends: 287 [2021-10-29 04:49:59,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-29 04:49:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-29 04:49:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-29 04:49:59,102 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2021-10-29 04:49:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:49:59,103 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-29 04:49:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-29 04:49:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-29 04:49:59,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:49:59,113 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:49:59,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:49:59,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:49:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:49:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1933825803, now seen corresponding path program 1 times [2021-10-29 04:49:59,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:49:59,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480305309] [2021-10-29 04:49:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:49:59,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:49:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:49:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 04:49:59,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:49:59,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480305309] [2021-10-29 04:49:59,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480305309] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:49:59,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:49:59,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:49:59,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044327698] [2021-10-29 04:49:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:49:59,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:49:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:49:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:59,284 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:49:59,719 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-29 04:49:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:49:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-29 04:49:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:49:59,727 INFO L225 Difference]: With dead ends: 715 [2021-10-29 04:49:59,727 INFO L226 Difference]: Without dead ends: 429 [2021-10-29 04:49:59,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-29 04:49:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-29 04:49:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-29 04:49:59,771 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-29 04:49:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:49:59,771 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-29 04:49:59,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:49:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-29 04:49:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-29 04:49:59,777 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:49:59,777 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:49:59,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 04:49:59,778 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:49:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:49:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 218745791, now seen corresponding path program 1 times [2021-10-29 04:49:59,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:49:59,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302048519] [2021-10-29 04:49:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:49:59,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:49:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:49:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-29 04:49:59,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:49:59,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302048519] [2021-10-29 04:49:59,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302048519] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:49:59,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:49:59,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:49:59,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839879023] [2021-10-29 04:49:59,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:49:59,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:49:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:49:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:49:59,866 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:00,213 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-29 04:50:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-29 04:50:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:00,217 INFO L225 Difference]: With dead ends: 715 [2021-10-29 04:50:00,217 INFO L226 Difference]: Without dead ends: 358 [2021-10-29 04:50:00,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-29 04:50:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-29 04:50:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-29 04:50:00,256 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-29 04:50:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:00,257 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-29 04:50:00,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-29 04:50:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-29 04:50:00,261 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:00,262 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:00,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 04:50:00,262 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 674879479, now seen corresponding path program 1 times [2021-10-29 04:50:00,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:00,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834764991] [2021-10-29 04:50:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:00,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-29 04:50:00,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:00,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834764991] [2021-10-29 04:50:00,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834764991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:00,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:00,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:50:00,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544750631] [2021-10-29 04:50:00,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:00,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:00,351 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:00,735 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-29 04:50:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-29 04:50:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:00,740 INFO L225 Difference]: With dead ends: 857 [2021-10-29 04:50:00,740 INFO L226 Difference]: Without dead ends: 500 [2021-10-29 04:50:00,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-29 04:50:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-29 04:50:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-29 04:50:00,768 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-29 04:50:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:00,769 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-29 04:50:00,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-29 04:50:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-29 04:50:00,774 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:00,774 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:00,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 04:50:00,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash -692381771, now seen corresponding path program 1 times [2021-10-29 04:50:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:00,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372916393] [2021-10-29 04:50:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:00,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-29 04:50:00,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:00,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372916393] [2021-10-29 04:50:00,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372916393] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:00,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:50:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935393232] [2021-10-29 04:50:00,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:00,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:00,907 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:01,390 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-29 04:50:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-29 04:50:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:01,398 INFO L225 Difference]: With dead ends: 1354 [2021-10-29 04:50:01,399 INFO L226 Difference]: Without dead ends: 855 [2021-10-29 04:50:01,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-29 04:50:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-29 04:50:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-29 04:50:01,438 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-29 04:50:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:01,439 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-29 04:50:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-29 04:50:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-29 04:50:01,447 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:01,447 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:01,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 04:50:01,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:01,449 INFO L85 PathProgramCache]: Analyzing trace with hash 240374715, now seen corresponding path program 1 times [2021-10-29 04:50:01,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:01,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992169280] [2021-10-29 04:50:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:01,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-29 04:50:01,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:01,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992169280] [2021-10-29 04:50:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992169280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:01,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:01,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:50:01,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696653687] [2021-10-29 04:50:01,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:01,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:01,590 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:01,953 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-29 04:50:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-29 04:50:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:01,959 INFO L225 Difference]: With dead ends: 1354 [2021-10-29 04:50:01,960 INFO L226 Difference]: Without dead ends: 713 [2021-10-29 04:50:01,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-29 04:50:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-29 04:50:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-29 04:50:01,985 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-29 04:50:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:01,986 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-29 04:50:01,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-29 04:50:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-29 04:50:01,989 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:01,990 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:01,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 04:50:01,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1229085797, now seen corresponding path program 1 times [2021-10-29 04:50:01,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:01,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243305068] [2021-10-29 04:50:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:01,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-29 04:50:02,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:02,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243305068] [2021-10-29 04:50:02,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243305068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:02,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:02,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:50:02,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159532546] [2021-10-29 04:50:02,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:50:02,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:50:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:02,084 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:02,711 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-29 04:50:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:50:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-29 04:50:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:02,719 INFO L225 Difference]: With dead ends: 1780 [2021-10-29 04:50:02,719 INFO L226 Difference]: Without dead ends: 997 [2021-10-29 04:50:02,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-29 04:50:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-29 04:50:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2359437751004017) internal successors, (1231), 996 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1231 transitions. [2021-10-29 04:50:02,757 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1231 transitions. Word has length 154 [2021-10-29 04:50:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:02,758 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1231 transitions. [2021-10-29 04:50:02,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1231 transitions. [2021-10-29 04:50:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-29 04:50:02,763 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:02,763 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:02,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 04:50:02,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:02,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2145598008, now seen corresponding path program 1 times [2021-10-29 04:50:02,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:02,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234260583] [2021-10-29 04:50:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:02,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-29 04:50:02,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:02,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234260583] [2021-10-29 04:50:02,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234260583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:02,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:02,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:50:02,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946031217] [2021-10-29 04:50:02,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:50:02,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:50:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:02,896 INFO L87 Difference]: Start difference. First operand 997 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:03,494 INFO L93 Difference]: Finished difference Result 2206 states and 2715 transitions. [2021-10-29 04:50:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:50:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-29 04:50:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:03,504 INFO L225 Difference]: With dead ends: 2206 [2021-10-29 04:50:03,519 INFO L226 Difference]: Without dead ends: 1210 [2021-10-29 04:50:03,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-29 04:50:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-29 04:50:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1927710843373494) internal successors, (1188), 996 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1188 transitions. [2021-10-29 04:50:03,579 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1188 transitions. Word has length 171 [2021-10-29 04:50:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:03,596 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1188 transitions. [2021-10-29 04:50:03,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1188 transitions. [2021-10-29 04:50:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-29 04:50:03,600 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:03,601 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:03,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 04:50:03,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1532628297, now seen corresponding path program 1 times [2021-10-29 04:50:03,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:03,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051777079] [2021-10-29 04:50:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:03,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:50:03,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051777079] [2021-10-29 04:50:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051777079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:50:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176582342] [2021-10-29 04:50:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:03,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:50:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:50:03,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:50:03,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 04:50:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 04:50:04,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:50:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-29 04:50:04,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:50:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-29 04:50:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176582342] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:05,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 04:50:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-10-29 04:50:05,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243175180] [2021-10-29 04:50:05,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:05,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 04:50:05,369 INFO L87 Difference]: Start difference. First operand 997 states and 1188 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:05,707 INFO L93 Difference]: Finished difference Result 1709 states and 2015 transitions. [2021-10-29 04:50:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-10-29 04:50:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:05,719 INFO L225 Difference]: With dead ends: 1709 [2021-10-29 04:50:05,719 INFO L226 Difference]: Without dead ends: 1707 [2021-10-29 04:50:05,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 04:50:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-29 04:50:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-29 04:50:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.1796675191815857) internal successors, (1845), 1564 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1845 transitions. [2021-10-29 04:50:05,772 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1845 transitions. Word has length 175 [2021-10-29 04:50:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1845 transitions. [2021-10-29 04:50:05,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1845 transitions. [2021-10-29 04:50:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-29 04:50:05,779 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:05,779 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:05,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:50:05,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-29 04:50:05,996 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1287881272, now seen corresponding path program 1 times [2021-10-29 04:50:05,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:05,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314688392] [2021-10-29 04:50:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:05,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-29 04:50:06,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:06,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314688392] [2021-10-29 04:50:06,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314688392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:06,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:06,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:50:06,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161347759] [2021-10-29 04:50:06,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:50:06,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:50:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:06,088 INFO L87 Difference]: Start difference. First operand 1565 states and 1845 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:06,593 INFO L93 Difference]: Finished difference Result 3200 states and 3779 transitions. [2021-10-29 04:50:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:50:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-10-29 04:50:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:06,606 INFO L225 Difference]: With dead ends: 3200 [2021-10-29 04:50:06,607 INFO L226 Difference]: Without dead ends: 1636 [2021-10-29 04:50:06,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:50:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-29 04:50:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-29 04:50:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.164525993883792) internal successors, (1904), 1635 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1904 transitions. [2021-10-29 04:50:06,669 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1904 transitions. Word has length 202 [2021-10-29 04:50:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:06,669 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1904 transitions. [2021-10-29 04:50:06,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1904 transitions. [2021-10-29 04:50:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-29 04:50:06,677 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:06,677 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:06,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 04:50:06,681 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1529632152, now seen corresponding path program 1 times [2021-10-29 04:50:06,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:06,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881237236] [2021-10-29 04:50:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:06,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-10-29 04:50:06,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:06,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881237236] [2021-10-29 04:50:06,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881237236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:06,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:06,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:50:06,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315459824] [2021-10-29 04:50:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:06,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:06,862 INFO L87 Difference]: Start difference. First operand 1636 states and 1904 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:07,239 INFO L93 Difference]: Finished difference Result 3555 states and 4140 transitions. [2021-10-29 04:50:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-10-29 04:50:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:07,252 INFO L225 Difference]: With dead ends: 3555 [2021-10-29 04:50:07,252 INFO L226 Difference]: Without dead ends: 1920 [2021-10-29 04:50:07,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-29 04:50:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1849. [2021-10-29 04:50:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 1.146103896103896) internal successors, (2118), 1848 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2118 transitions. [2021-10-29 04:50:07,313 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2118 transitions. Word has length 233 [2021-10-29 04:50:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:07,313 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2118 transitions. [2021-10-29 04:50:07,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2118 transitions. [2021-10-29 04:50:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-29 04:50:07,322 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:07,322 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:07,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-29 04:50:07,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1886815535, now seen corresponding path program 1 times [2021-10-29 04:50:07,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:07,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945342138] [2021-10-29 04:50:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:07,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-29 04:50:07,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:07,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945342138] [2021-10-29 04:50:07,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945342138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:50:07,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765314863] [2021-10-29 04:50:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:07,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:50:07,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:50:07,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:50:07,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 04:50:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 04:50:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:50:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-29 04:50:08,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:50:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-29 04:50:09,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765314863] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:09,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 04:50:09,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-29 04:50:09,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637346049] [2021-10-29 04:50:09,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:09,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:50:09,560 INFO L87 Difference]: Start difference. First operand 1849 states and 2118 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:09,893 INFO L93 Difference]: Finished difference Result 2135 states and 2428 transitions. [2021-10-29 04:50:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-10-29 04:50:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:09,908 INFO L225 Difference]: With dead ends: 2135 [2021-10-29 04:50:09,908 INFO L226 Difference]: Without dead ends: 2133 [2021-10-29 04:50:09,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:50:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-10-29 04:50:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1778. [2021-10-29 04:50:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.1418120427687113) internal successors, (2029), 1777 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2029 transitions. [2021-10-29 04:50:10,001 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2029 transitions. Word has length 255 [2021-10-29 04:50:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:10,002 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2029 transitions. [2021-10-29 04:50:10,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2029 transitions. [2021-10-29 04:50:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-10-29 04:50:10,011 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:50:10,012 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:10,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:50:10,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-29 04:50:10,227 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:50:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:50:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash -791200203, now seen corresponding path program 1 times [2021-10-29 04:50:10,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:50:10,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132038760] [2021-10-29 04:50:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:50:10,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:50:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:50:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-29 04:50:10,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:50:10,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132038760] [2021-10-29 04:50:10,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132038760] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:50:10,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:50:10,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:50:10,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104065747] [2021-10-29 04:50:10,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 04:50:10,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:50:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 04:50:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:10,465 INFO L87 Difference]: Start difference. First operand 1778 states and 2029 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:50:10,796 INFO L93 Difference]: Finished difference Result 3056 states and 3513 transitions. [2021-10-29 04:50:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:50:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-10-29 04:50:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:50:10,798 INFO L225 Difference]: With dead ends: 3056 [2021-10-29 04:50:10,798 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 04:50:10,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 04:50:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 04:50:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 04:50:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 04:50:10,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 267 [2021-10-29 04:50:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:50:10,803 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 04:50:10,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:50:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 04:50:10,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 04:50:10,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:50:10,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 04:50:10,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 04:50:10,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:50:10,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:50:10,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:50:11,306 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-29 04:50:11,306 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-29 04:50:11,307 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-29 04:50:11,308 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-29 04:50:11,308 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-29 04:50:11,308 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-29 04:50:11,308 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-29 04:50:11,308 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-29 04:50:11,309 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-29 04:50:11,309 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-29 04:50:11,309 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-29 04:50:11,309 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-29 04:50:11,309 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-29 04:50:11,310 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-29 04:50:11,311 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-29 04:50:11,311 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-29 04:50:11,311 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-29 04:50:11,311 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-29 04:50:11,311 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-29 04:50:11,312 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-29 04:50:11,312 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-29 04:50:11,312 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-29 04:50:11,312 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-29 04:50:11,312 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-29 04:50:11,313 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-29 04:50:11,314 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-29 04:50:11,314 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 04:50:11,314 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-29 04:50:11,314 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-29 04:50:11,314 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-29 04:50:11,315 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-29 04:50:11,315 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-29 04:50:11,315 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-29 04:50:11,315 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-29 04:50:11,316 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-29 04:50:11,316 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-29 04:50:11,316 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-29 04:50:11,316 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-29 04:50:11,316 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 04:50:11,317 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-29 04:50:11,317 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-29 04:50:11,317 INFO L857 garLoopResultBuilder]: For program point L521-1(lines 40 585) no Hoare annotation was computed. [2021-10-29 04:50:11,317 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-29 04:50:11,317 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L524-1(lines 40 585) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-29 04:50:11,318 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L525(line 525) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-29 04:50:11,319 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-29 04:50:11,320 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-29 04:50:11,320 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-29 04:50:11,320 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-29 04:50:11,320 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 525) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-29 04:50:11,321 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-29 04:50:11,326 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:50:11,327 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:50:11,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:50:11 BoogieIcfgContainer [2021-10-29 04:50:11,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:50:11,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:50:11,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:50:11,359 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:50:11,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:49:57" (3/4) ... [2021-10-29 04:50:11,363 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 04:50:11,390 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-29 04:50:11,392 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-29 04:50:11,394 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-29 04:50:11,396 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 04:50:11,553 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:50:11,554 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:50:11,555 INFO L168 Benchmark]: Toolchain (without parser) took 17940.28 ms. Allocated memory was 96.5 MB in the beginning and 239.1 MB in the end (delta: 142.6 MB). Free memory was 60.0 MB in the beginning and 201.7 MB in the end (delta: -141.7 MB). Peak memory consumption was 129.7 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,556 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 51.6 MB in the beginning and 51.5 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:50:11,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 905.23 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 59.8 MB in the beginning and 88.3 MB in the end (delta: -28.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 161.25 ms. Allocated memory is still 130.0 MB. Free memory was 88.3 MB in the beginning and 82.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,557 INFO L168 Benchmark]: Boogie Preprocessor took 137.23 ms. Allocated memory is still 130.0 MB. Free memory was 82.6 MB in the beginning and 78.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,558 INFO L168 Benchmark]: RCFGBuilder took 2351.39 ms. Allocated memory is still 130.0 MB. Free memory was 78.5 MB in the beginning and 76.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,558 INFO L168 Benchmark]: TraceAbstraction took 14164.45 ms. Allocated memory was 130.0 MB in the beginning and 239.1 MB in the end (delta: 109.1 MB). Free memory was 76.5 MB in the beginning and 90.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 95.9 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,559 INFO L168 Benchmark]: Witness Printer took 194.93 ms. Allocated memory is still 239.1 MB. Free memory was 90.0 MB in the beginning and 201.7 MB in the end (delta: -111.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:50:11,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 96.5 MB. Free memory was 51.6 MB in the beginning and 51.5 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 905.23 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 59.8 MB in the beginning and 88.3 MB in the end (delta: -28.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 161.25 ms. Allocated memory is still 130.0 MB. Free memory was 88.3 MB in the beginning and 82.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 137.23 ms. Allocated memory is still 130.0 MB. Free memory was 82.6 MB in the beginning and 78.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2351.39 ms. Allocated memory is still 130.0 MB. Free memory was 78.5 MB in the beginning and 76.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14164.45 ms. Allocated memory was 130.0 MB in the beginning and 239.1 MB in the end (delta: 109.1 MB). Free memory was 76.5 MB in the beginning and 90.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 95.9 MB. Max. memory is 16.1 GB. * Witness Printer took 194.93 ms. Allocated memory is still 239.1 MB. Free memory was 90.0 MB in the beginning and 201.7 MB in the end (delta: -111.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 525]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.0s, OverallIterations: 14, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 586 SDtfs, 991 SDslu, 62 SDs, 0 SdLazy, 3200 SolverSat, 803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 897 GetRequests, 871 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=12, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 1065 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 207 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2878 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 182 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 2622 NumberOfCodeBlocks, 2622 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3034 ConstructedInterpolants, 0 QuantifiedInterpolants, 10441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 3081/3276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-29 04:50:11,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb76688f-13d3-40fb-aae3-b192da92098d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...